Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6c9d0d7288e61d…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 03:01:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c8824e8cbb80bc001fcfdd1876d796fc SHA-1: ac1b757da8a16d9a74af2c6072524eca3104bc86 SHA-256: 8b6c9d0d7288e61da2f4cef6ea091bccb61e49ab4d582126464ea28ca4acbbd4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document exhibits high-risk behavior by employing a 'secret recovery' lure, prompting users to divulge sensitive information. It also contains multiple embedded URLs, including one pointing to 'netcdn.xyz', which likely serve as download locations for further malicious payloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a targeted phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/master-coin-free-link-game-hack
    • http://dcmetroapp.com/images/get-free-lives-on-coin-master_GM406889139.pdf
    • http://dcmetroapp.com/images/roblox-help-free-robux_GM431946152.pdf
    • http://dcmetroapp.com/images/coin-master-free-cards-2021_GM406889139.pdf
    • http://dcmetroapp.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://dcmetroapp.com/images/robloxheroxyz-free-robux_GM431946152.pdf
    • http://dcmetroapp.com/images/free-multiplayer-minecraft-server_GM479516143.pdf
    • http://dcmetroapp.com/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdf
    • http://dcmetroapp.com/images/coin-master-hack-apk_GM406889139.pdf
    • http://dcmetroapp.com/images/coin-master-hack-september-2021_GM406889139.pdf
    • http://dcmetroapp.com/images/roblox-inappropriate_GM431946152.pdf
    • http://dcmetroapp.com/images/roblox-script-hack_GM431946152.pdf
    • http://dcmetroapp.com/images/coin-master-gold-cards-free_GM406889139.pdf
    • http://dcmetroapp.com/images/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://dcmetroapp.com/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://dcmetroapp.com/images/coin-master-free-spins-link-deutsch-ios_GM406889139.pdf
    • http://dcmetroapp.com/images/coin-master-cheats-and-hacks_GM406889139.pdf
    • http://dcmetroapp.com/images/minecraft-toolbox-premium-apk_GM479516143.pdf
    • http://dcmetroapp.com/images/give-me-robux_GM431946152.pdf
    • http://dcmetroapp.com/images/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://dcmetroapp.com/images/how-to-hack-coin-master-apple_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cce.bin
0a6d879a3b245e8772ad64aaeb6a069b7df52bb9de9a041c2708b6c4a6f36c7d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCE 24828 bytes
font_01_sfnt_off000085c3.bin
f325bc51a5f33ec2ea6c889aa635c0e4104002a1859551a05fb0fcec2a10294b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C3 17880 bytes

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